Saoirse Ronan is going to play Melanie Stryder, the main character in the screen adaptation of The Host, a sci-fi novel by Stephenie Meyer, which deals with aliens called Souls. These parasites invade human bodies, fuse to each person’s consciousness and systematically erase their personalities. Melanie is captured by the aliens and implanted by a Soul called Wanderer, something of a legend because of all of the “hosts” she has attached to on numerous planets. Wanderer’s goal is to get Melanie to give up the remaining pockets of humans, but instead the alien finds Melanie to be unique in her unwillingness to surrender her consciousness. Wanderer is so overwhelmed by Melanie’s memories and feelings, the alien is driven to reconnect with Melanie’s old life.
Andrew Niccol, who previously wrote the screenplays for The Truman Show and Gattaca, wrote the script for the movie.
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